Editing Dinitrogen tetroxide (section)

{{chembox
| Verifiedfields = changed
| Watchedfields  = changed
| verifiedrevid  = 477162897
| Name           = Dinitrogen tetroxide
| ImageFile      = 
| ImageFileL1    = Dinitrogen tetroxide.svg
| ImageClassL1 = skin-invert-image
| ImageNameL1    = Full structural formula
| ImageFileR1    = Dinitrogen-tetroxide-3D-vdW.png
| ImageClassR1 = bg-transparent
| ImageNameR1    = Space-filling model
| ImageFile2     = Nitrogen dioxide at different temperatures.jpg
| ImageSize2     = 240
| ImageCaption2  = [[Nitrogen dioxide]] at −196&nbsp;°C, 0&nbsp;°C, 23&nbsp;°C, 35&nbsp;°C, and 50&nbsp;°C. ({{chem|NO|2}}) converts to the colorless dinitrogen tetroxide ({{chem|N|2|O|4}}) at low temperatures, and reverts to {{chem|NO|2}} at higher temperatures.
| ImageFile2_Ref = {{chemboximage|correct|??}}
| ImageName2     = Nitrogen dioxide at different temperatures
| IUPACName      = Dinitrogen tetroxide
| OtherNames     = 
| SystematicName = 
| Section1       = {{Chembox Identifiers
| CASNo = 10544-72-6
| CASNo_Ref = {{cascite|correct|CAS}}
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| ChemSpiderID = 23681
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 29803
| Gmelin = 2249
| PubChem = 25352
| EINECS = 234-126-4
| UNII_Ref = {{fdacite|correct|FDA}}
| UNII = M9APC3P75A
| UNNumber = 1067
| RTECS = QW9800000
| SMILES = [O-][N+](=O)[N+]([O-])=O
| InChI = 1/N2O4/c3-1(4)2(5)6
| InChIKey = WFPZPJSADLPSON-UHFFFAOYAS
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChI = 1S/N2O4/c3-1(4)2(5)6
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = WFPZPJSADLPSON-UHFFFAOYSA-N
  }}
| Section2       = {{Chembox Properties
| N=2 | O=4
| Appearance = White solid, colorless liquid, orange gas
| Density = 1.44246{{nbsp}}g/cm<sup>3</sup> (liquid, 21&nbsp;°C)
| Solubility = Reacts to form nitrous and nitric acids
| MeltingPtC = −11.2
| MeltingPt_notes = and decomposes to NO<sub>2</sub>
| BoilingPtC = 21.69
| VaporPressure = 96{{nbsp}}kPa (20{{nbsp}}°C)<ref>[https://www.ilo.org/dyn/icsc/showcard.display?p_lang=en&p_card_id=0930&p_version=2 ''International Chemical Safety Card''] https://www.ilo.org/dyn/icsc/showcard.display?p_lang=en&p_card_id=0930&p_version=2</ref>
| RefractIndex = 1.00112
| MagSus = −23.0·10<sup>−6</sup>{{nbsp}}cm<sup>3</sup>/mol
  }}
| Section3       = {{Chembox Structure
| MolShape = Planar, ''D''<sub>2h</sub>
| Dipole = small, non-zero
  }}
| Section4       = {{Chembox Thermochemistry
| DeltaHf = +9.16{{nbsp}}kJ/mol<ref name=Atkins>P.W. Atkins and J. de Paula, ''Physical Chemistry'' (8th ed., W.H. Freeman, 2006) p.999</ref>
| Entropy = 304.29{{nbsp}}J/K⋅mol<ref name=Atkins/>
  }}
| Section5       = 
| Section6       = 
| Section7       = {{Chembox Hazards
| ExternalSDS = [https://www.airgas.com/msds/001041.pdf External SDS]
| GHSPictograms = {{GHS03}}{{GHS05}}{{GHS06}}{{GHS07}}
| GHSSignalWord = Danger
| HPhrases = {{H-phrases|270|314|330|335|336}}
| PPhrases = {{P-phrases|220|244|260|261|264|271|280|284|301+330+331|303+361+353|304+340|305+351+338|310|312|320|321|363|370+376|403|403+233|405|410+403|501}}
| NFPA-H = 3
| NFPA-F = 0
| NFPA-R = 0
| NFPA-S = OX
| NFPA_ref = <ref>{{cite web |url= https://cameochemicals.noaa.gov/chemical/4075 |title= Chemical Datasheet: Nitrogen tetroxide |work= [[CAMEO Chemicals]] [[National Oceanic and Atmospheric Administration|NOAA]] |access-date= 8 September 2020}}</ref><ref>{{cite web |url= https://pubchem.ncbi.nlm.nih.gov/compound/Dinitrogen-tetroxide#section=NFPA-Hazard-Classification |title= Compound Summary: Dinitrogen tetroxide |work= [[PubChem]] |access-date= 8 September 2020}}</ref>
| FlashPt = Non-flammable
| LD50 =
| PEL =
  }}
| Section8       = {{Chembox Related
| OtherFunction = {{ubl
 | [[Nitrous oxide]]
 | [[Nitric oxide]]
 | [[Dinitrogen trioxide]]
 | [[Nitrogen dioxide]]
 | [[Dinitrogen pentoxide]]
 }}
| OtherFunction_label = [[nitrogen]] [[oxide]]s
| OtherCompounds = {{ubl
| [[Phosphorus tetroxide]]
| [[Arsenic tetroxide]]
| [[Antimony tetroxide]]
}}
  }}
}}
'''Dinitrogen tetroxide''', commonly referred to as '''nitrogen tetroxide''' ('''NTO'''), and occasionally (usually among ex-USSR/Russian rocket engineers) as '''amyl''', is the [[chemical compound]] N<sub>2</sub>O<sub>4</sub>. It is a useful [[reagent]] in chemical synthesis. It forms an [[Chemical equilibrium|equilibrium mixture]] with [[nitrogen dioxide]]. Its molar mass is 92.011 g/mol.

Dinitrogen tetroxide is a powerful [[oxidizer]] that is [[hypergolic]] (spontaneously reacts) upon contact with various forms of [[hydrazine]], which has made the pair a common [[bipropellant]] for rockets.